Influencia del régimen de caudales en los movimientos reproductivos de la trucha común en la Península Ibérica
- García-Vega, A. 1
- Francisco Javier Sanz Ronda
- Fuentes-Pérez, J.F. 2
- Francisco Javier Bravo Córdoba
- P.M. Leunda Urretabizkaia
- 1 U.D. Hidráulica e Hidrología. Universidad de Valladolid
- 2 Centre for Biorobotics, Tallinn University of Technology, Estonia
ISSN: 1575-2410, 2386-8368
Year of publication: 2019
Issue: 45
Pages: 251-260
Type: Article
More publications in: Cuadernos de la Sociedad Española de Ciencias Forestales
Sustainable development goals
Abstract
Brown trout (Salmo trutta) is a worldwide distributed species with a great social and economic importance. Its reproductive migration is generally triggered by the decrease in water temperature and the increase in flow rate. Therefore, anthropogenic alterations in these factors may cause negative impacts on its populations. The main goal of this study is to understand the consequences on brown trout migration caused by artificial alterations in the flow regimen. To achieve this, brown trout captures in two fishways (mandatory pass points during migration) located in two rivers of the Iberian Peninsula with different flow regimens and under two different regulation scenarios (regulated and non-regulated) are analyzed. Results show that the increase in flow rate triggers the movement and significantly influences the onset and maintenance of reproductive migration. In addition, the different flow regimens situated migration peaks in different dates. The knowledge about the factors that influence the brown trout migration is crucial to define conservation and management strategies for this species (e.g. definition of environmental flows, fishways operation dates or fishing periods and quotas).